376 results about "Dry mixing" patented technology

The invention discloses ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete comprises the following components in percentage by mass: 15%-25% of cement, 3%-6% of nano SiO2, 30%-35% of fly ash or steel slag powder, 35%-40% of recycled aggregate, 1%-4% of fiber, 0.5% of a microbial remediation agent and 1%-3% of nano TiO2. The preparation method comprises the following steps: S1, pretreating the recycled aggregate; and S2, packaging the microbial remediation agent: mixing the bacillus pasteurii spores with calcium lactate, and wrapping the mixture in calcium phosphate microspheres. S3, step-by-step stirring; S3.1, dry mixing: uniformly stirring the cement, the fly ash, the nano SiO2, the nano TiO2 and the recycled aggregate; s3.2, wet mixing is carried out, water solution fibers containing the polycarboxylic acid water reducing agent are added, uniform stirring is carried out, and the water-binder ratio of the water solution containing the polycarboxylic acid water reducing agent is 0.18; s3.3, final mixing: adding the packaged microbial remediation agent, and uniformly stirring; and S4, directional curing: performing steam curing at 80 DEG C for 48 hours, performing ultraviolet irradiation, and performing constant-temperature and constant-humidity curing for 7 days. The ultra-high performance concrete has the effects of low cost, low carbon emission, multi-function integration and repeatable crack self-repairing.

The invention relates to the technical field of cement materials, in particular to a red-mud-containing steel slag composite cementing material and a preparation method thereof.The method comprises the steps that red mud, slag, steel slag, desulfurized gypsum and sulphoaluminate cement clinker are subjected to dry mixing to obtain an initial mixture; determining whether the excitation capability of the potential hydration activity reaches the standard or not based on the alkaline matching index, and adjusting the weight part of the sulphoaluminate cement clinker; adding a composite exciting agent to obtain activated slurry; determining whether the dispersion effect of the flocculation structure of the initial mixture is qualified or not based on the dispersion index of the flocculation structure, and adjusting the ball milling rotating speed; adding a polymer emulsion to obtain an initial composite cementing material; determining whether the synergistic enhancement effect of the polymer emulsion and the activated slurry is qualified or not based on the synergistic enhancement index, and adjusting the dripping rate of the polymer emulsion; the steel slag composite cementing material containing the red mud is obtained. The preparation stability of the red mud-containing steel slag composite cementing material is improved.

The invention discloses a composite conditioner for acid soil of slope cropland and application of the composite conditioner. The conditioner comprises the following components in percentage by mass: 12%-18% of calcium peroxide, 18%-32% of a buffer mineral compound, 1.5%-3.0% of an anti-scouring controlled-release material, 10%-25% of a nutrient carrier and fertilizer, 0.5%-3.0% of a binder and a granulation aid, and the balance of inert filler and water. The preparation process comprises the steps of dry mixing, granulation, drying and coating. The product provided by the invention can realize high residue of CaO and stable pH under the condition of heavy rainfall of slope cropland, effectively inhibit the pH fall of acid soil, reduce aluminum toxicity and reduce nutrient loss. By controlling the content and proportion of the calcium peroxide, the buffer mineral compound and the anti-scouring controlled-release material, the calcium peroxide, the buffer mineral compound and the anti-scouring controlled-release material have a synergistic effect in a slope cropland environment, so that not only is the initial rapid acid inhibition capability ensured, but also the lasting pH stability and high residual rate are realized through buffer and controlled-release technologies.

The invention relates to a composite hydroxypropyl methylcellulose skeleton sustained-release material and a preparation method thereof, and belongs to the technical field of drug sustained release. The sustained-release material is prepared from 70 to 90 parts of hydroxypropyl methylcellulose (HPMC), 10 to 20 parts of sodium alginate, 8 to 15 parts of chitosan, 0.1 to 0.2 part of Omega-3 fatty acid, 0.05 to 0.06 part of vitamin D, 2.5 to 5 parts of soluble calcium salt-zinc salt composite cross-linking agent, 0.5 to 1.5 parts of hydrolyzable cross-linking agent, 3 to 10 parts of enzyme sensitive auxiliary material, 1 to 5 parts of pore-foaming agent and 2 to 8 parts of hydrophobic blocking agent. The preparation method comprises the steps of raw material pretreatment and dry mixing, active component dispersion liquid preparation, wet granulation and primary cross-linking, secondary cross-linking and drying, vacuum drying and size stabilization, curing and packaging and the like. The sustained-release material provided by the invention has the advantages of controllable drug release rate, good mechanical strength and biodegradability, is suitable for sustained-release delivery of Omega-3 fatty acid, vitamin D and other active components, and can improve the bioavailability and stability of drugs.

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a biomass reinforced cement-based thermal insulation wall material and the wall material. The preparation method comprises the following steps: (1) crushing wood fibers, putting the crushed wood fibers into a NaOH solution, washing with water and drying; (2) carrying out dry mixing on cement, the modified wood fiber, nano SiO2 particles and calcium stearate; (3) diluting hydrogen peroxide with warm water, adding into the mixture, and stirring; (4) injecting the foaming slurry into a mold, and vibrating; and (5) steam curing. Through a collaborative technology of fiber surface modification, nano-particle regulation and control and hydrophobic layer construction, the comprehensive performance breakthrough of the fireproofing grade of A1 grade, the heat conductivity coefficient of 0.048-0.055 W / (m.K) and the compressive strength of 1.2-1.8 MPa is realized. The energy consumption is reduced by 70% through the low-temperature steam curing process, the proportion of agricultural waste is larger than or equal to 30%, the carbon emission intensity is smaller than or equal to 150 kgCO2 / m < 3 >, and the requirement for green buildings is met.

The invention belongs to the technical field of negative carbon building materials, and particularly relates to a multi-element solid waste negative carbon cement-based material and a preparation method thereof. The material is prepared from the following components in parts by weight: 10 to 320 parts of carbonized carbide slag, 0 to 240 parts of uncarbonized carbide slag, 25 to 640 parts of calcined coal gangue, 25 to 800 parts of Portland cement, 6 to 320 parts of silica fume and other pozzolanic mineral admixtures and 30 to 800 parts of mixing water. The preparation method comprises the following steps: carbonizing the carbide slag until the content of calcium carbonate is more than or equal to 90%, and calcining and activating the coal gangue at 700-800 DEG C; all the powder raw materials are subjected to dry mixing, water is added for segmented stirring, and standard curing is performed after pouring forming. The carbonized carbide slag is used for replacing limestone to achieve carbon sequestration, the calcined coal gangue is used for replacing calcined clay, natural resources are prevented from being exploited, the cement clinker replacement rate of 70% is achieved through the synergistic effect of multi-element solid waste in a low clinker system, the material has excellent mechanical and durability, and carbon emission and resource consumption are remarkably reduced.

The invention discloses a carbide slag fly ash concrete aerated block and a preparation method thereof, and belongs to the technical field of resource utilization of building materials and solid waste. The aerated block comprises the following raw materials: carbide slag, fly ash, gypsum, Portland cement, aluminum powder paste, a nano core-shell structure calcium-aluminum-silicon polymer and a zwitterionic foam-stabilizing polymer, the raw materials have a specific weight part range. Wherein the nano core-shell structure calcium-aluminum-silicon polymer is prepared by dispersing fly ash in water to form slurry, reacting the slurry with sodium silicate and a sodium metaaluminate solution in sequence, then adding calcium nitrate and a zinc sulfate solution for continuous reaction, and carrying out separation, washing, drying and grinding; the zwitterionic foam-stabilizing polymer is prepared by polymerizing a monomer in a solvent, precipitating and separating out, quaternizing, activating carboxyl crosslinking, dialyzing and purifying, and freeze-drying. All the steps relate to process parameters such as dry mixing time, stirring time, curing temperature, pressure and time, and the performance of the aerated block is improved through component optimization and preparation process improvement.

The invention belongs to the field of fiber reinforced composite materials, and provides an SCA modified basalt fiber cement base and a preparation method thereof.The preparation method comprises the following steps that basalt fibers are pretreated; a gamma-aminopropyltriethoxysilane solution, a gamma-glycidyl ether oxypropyltrimethoxysilane solution and a gamma-methacryloyloxypropyltrimethoxysilane solution are prepared, and the dried basalt fibers are soaked in the solutions respectively to be modified; naturally airing at room temperature after soaking, drying in an air dry oven, cooling to room temperature, and sealing and storing; carrying out dry mixing on the modified basalt fiber, ordinary Portland cement, sand and an additive to prepare an SCA modified basalt fiber cement base; by adopting different SCAs and introducing additional reaction functional groups, the interface bonding strength between the basalt fibers and a cement matrix is improved, and the problem of non-uniform fiber dispersion is solved, so that the comprehensive performance of the material is improved.

The invention discloses a goaf filling material based on coal slime and a carbon sequestration method. The goaf filling material comprises the following steps: preparing a composite activator and a plurality of pretreated coal slime, steel slag, superfine slag powder and desulfurized gypsum raw materials; the preparation method comprises the following steps: mixing coal slime, steel slag, superfine slag powder, desulfurized gypsum raw materials and a composite activator in proportion, putting into a closed reaction kettle, and carrying out dry mixing and sufficient stirring; adding a proper amount of water into the dry-mixed raw materials according to a solid-to-liquid ratio of 7: 3, and stirring the water and the raw materials through a reaction kettle until the water and the raw materials are fully mixed to form a strong alkali mixture; filling CO2 gas into the reaction kettle, carrying out primary mineralization reaction, and stirring in the reaction kettle to obtain a paste filling material; conveying the paste filling material to a goaf through a pump body, and performing filling operation according to a preset filling process; and after the filled paste filling material is initially set, secondary mineralization reaction is carried out, supercritical CO2 gas is injected into the paste filling material through the pre-buried pipeline, residual alkaline substances in the paste filling material react, and a compact anti-seepage structure is formed.

The invention relates to the technical field of graphite preparation processes, in particular to a preparation process of high-purity isostatic pressing graphite, which comprises the following steps: crushing calcined petroleum coke or pitch coke raw materials, carrying out primary grinding, carrying out dry mixing on the raw material powder obtained by the primary grinding, and then adding qualified modified pitch for wet mixing to prepare a paste material; performing secondary grinding to obtain paste powder, performing isostatic compaction, and performing pressure relief to obtain a green body; then the green body is placed in a roasting furnace to be vacuumized, nitrogen is introduced for heating and roasting, the temperature gradient of each temperature measuring point is obtained in the roasting process, the frequency domain characteristic difference between the different temperature measuring points in the roasting furnace is calculated, the temperature gradient difference is obtained, then the heating rate in the roasting process is controlled and adjusted, and a roasted product is obtained. And graphitizing and purifying the roasted product to prepare the high-purity isostatic pressing graphite. The preparation method can improve the preparation quality of the isostatic pressing graphite.

The invention provides a sulfide all-solid-state battery positive electrode membrane as well as a preparation method and application thereof, and relates to the technical field of solid-state batteries. Specifically, the method comprises the following steps: carrying out dry-process mixing on positive electrode component raw materials, and then carrying out hot rolling to obtain a positive electrode film; wherein the positive electrode component raw materials comprise a positive electrode active material, sulfide solid electrolyte, a conductive agent and polytetrafluoroethylene. According to the preparation method, the positive electrode film is prepared by taking polytetrafluoroethylene as a unique bonding component through the technological processes of dry mixing and hot rolling, so that the stress change caused by volume expansion of the positive electrode is effectively inhibited, and the positive electrode capacity is exerted under the load of a high electrode active material; and the preparation process is simple and easy to implement and low in cost, and has good generalizability and application prospects.

The invention discloses an anti-cracking calcium silicate board and a preparation method thereof, and relates to the technical field of light building materials. The method comprises the following steps: carrying out ball milling, acid pickling and silane coupling agent surface modification on quartz sand to obtain alkylated quartz sand; and carrying out dry mixing on the mixture, metakaolin, silica fume and cement. The linen fiber is subjected to alkali treatment and hydroxyethyl acrylate graft modification, and the PVA fiber is subjected to silane coupling agent and nano silicon dioxide coating treatment. Dispersing graphene oxide, carboxylated styrene-butadiene emulsion and other assistants in water, adding the dry mixture, uniformly stirring, and then adding the two modified fibers to prepare mixed slurry; and finally, carrying out pressure forming, pre-curing, high-pressure steam curing and drying to obtain a finished product. Through substrate silanization, fiber grafting / nanocrystalline seed modification and synergistic introduction of graphene oxide and elastic emulsion, the interface bonding strength and toughness are remarkably enhanced, crack initiation and propagation are effectively inhibited, and the plate has excellent cracking resistance.

The invention relates to the technical field of conductive materials, and discloses ECC concrete based on carbon black doping and a preparation method and application thereof.The preparation method includes the following steps that cement, slag, quartz sand, silica fume and limestone powder are subjected to dry mixing to obtain a dry material; dispersing carbon black and a dispersing agent in water to obtain carbon black dispersion liquid; and mixing the dry material, the carbon black dispersion liquid, a polycarboxylate superplasticizer and polyethylene fibers to obtain the carbon black doped concrete. The conductivity of the ECC concrete is improved through the carbon black, the ECC concrete is applied to the field of friction nano-generators, potential difference can be formed through extrusion of an automobile in the using process, and therefore current is output to supply power to traffic lights, monitoring equipment and the like.

The invention discloses road and bridge anti-heavy load concrete and a preparation method thereof, relates to the technical field of concrete technology, and belongs to the patent classification number C04B28 / 00. The preparation method of the concrete comprises the following steps: firstly, impregnating and activating polypropylene fibers with a potassium permanganate acid solution, then treating with aminopropyltriethoxysilane to obtain interface modified fibers, preparing a suspension from the interface modified fibers, mixing with a premixed solution of nano silicon dioxide containing a water-borne epoxy resin emulsion, and reacting to obtain a fiber reinforced composite material; the preparation method comprises the following steps: mixing metakaolin and silica fume, adding waterborne polyurethane and carboxylated multi-walled carbon nanotubes, carrying out high-speed shearing, carrying out spray drying to obtain interface reinforced microspheres, carrying out dry mixing on cement, machine-made sand, granite gravel, mineral powder and a fiber reinforced material, adding a polycarboxylic acid water reducer solution, carrying out high-speed stirring, adding the microspheres, and carrying out medium-speed stirring to obtain the concrete. The concrete prepared by the invention has excellent mechanical strength, so that the heavy load resistance is realized.

The utility model discloses a dry mixer convenient to clean, and relates to the technical field of dry mixers. The dough kneading device comprises a base, T-shaped plates are arranged on the two sides of the base in a sliding fit mode, a supporting plate is fixedly arranged on one side of each T-shaped plate in a matched mode, a clamping plate is elastically arranged on one side of each supporting plate in a sliding fit mode, a dough kneading box is arranged on the upper side of the base in a sliding fit mode, and one end of each clamping plate is matched with one side of the dough kneading box in a clamped connection mode. The U-shaped plate is fixedly matched with the upper side of the base, a dry mixing box is arranged on the upper side of the U-shaped plate, and the dough kneading box is located in the U-shaped plate. Through the arrangement of the clamping plate, one end of the clamping plate slides in and out of the dough kneading box under the action of a worker, and the dough kneading box is fixed and unfixed through one end of the clamping plate, so that the process that the dough kneading box slides out of the interior of the U-shaped plate is more convenient, and the process that the interior of the dough kneading box is cleaned is more convenient.

The invention relates to the technical field of hard alloys, and particularly discloses a ruthenium boride reinforced ultra-ultra coarse grain WC-Co hard alloy and a preparation method thereof in order to solve the problems of low strength and hardness and poor toughness of an ultra-ultra coarse grain alloy product caused by difficult control of grain size in an existing ultra-ultra coarse grain alloy preparation process. The ultra-coarse grain WC-Co hard alloy comprises the following raw materials: 0.5-5% of ruthenium-boron mixed powder, 5-10% of cobalt powder and the balance of tungsten carbide particles. Wherein the number ratio of ruthenium atoms to boron atoms in the ruthenium-boron mixed powder is 1: (0.5-1.5), and the carbon adjusting range of the total mass of tungsten and carbon in the tungsten carbide particles is 6.08-6.20 wt%. The problems that WC particles are excessively crushed and Co phases are non-uniformly distributed are solved by utilizing high-energy stirring dry mixing without adding a grinding body and combining a flexible wet grinding process with extremely short time and extremely low ball-to-material ratio, and Ru powder and B powder are introduced and combined with a special sintering process, so that the effects of high toughness, high hardness, high heat conductivity and the like of the ultra-coarse grain alloy are achieved.

This invention discloses a dry bonding method for positive electrode materials and solid electrolyte layers in solid-state batteries. The method first involves dry mixing and pre-pressing positive electrode active material powder, solid electrolyte powder, and conductive agent powder to form a positive electrode composite material preform. Subsequently, the surface of the solid electrolyte layer is activated to increase its surface energy. A key step is to apply longitudinal vibration at a specific frequency and amplitude to the preform and the activated solid electrolyte layer for resonant acoustic interface coupling treatment, causing microscopic rearrangement and initial meshing of interface particles. This invention is solvent-free throughout the process. Through the synergistic effect of vibration and hot pressing, a stable interface with tight contact, strong bonding, and low impedance is constructed at the microscale, effectively solving problems such as poor interface contact, easy peeling, or performance degradation caused by solvent residue in existing dry and wet processes. It is particularly suitable for high-activity solid-state battery systems.

The invention discloses a polymer modified exterior wall putty manufacturing process and a product. The polymer modified exterior wall putty manufacturing process comprises the following steps: preparing the following components in parts by weight: 40-60 parts of an inorganic cementing material, 30-50 parts of aggregate, 2-8 parts of a polymer modifier, 0.1-0.5 part of cellulose ether, 0.5-2 parts of a waterproof agent and 0-5 parts of a functional additive; the inorganic cementing material and the aggregate are put into a mixing machine for dry mixing; and adding the polymer modifier, the cellulose ether, the waterproof agent and the functional additive, and uniformly mixing.

The invention discloses a preparation method of a multi-layer decorative plate based on foamed gypsum and a silicon crystal composite material in the field of building decorative materials, and the preparation method of the multi-layer decorative plate comprises the following steps: mixing and stirring gypsum, a water reducing agent and water into uniform slurry, adding a foaming agent to form foam, adding a modified interface agent, stirring at a low speed, injecting into a mold, and molding to obtain the multi-layer decorative plate. Standing at room temperature, primarily curing and curing in a drying oven to obtain a foamed gypsum surface layer; mixing a modified interface agent with silica sol to form viscous slurry, adding glass fibers, stirring, and blade-coating on the surface layer to form a transition layer; the modified diatomite, the expanded perlite, the hydroxyapatite and the cellulose ether are subjected to dry mixing, then water is added, stirring is performed to form pug, compression molding and drying are performed, and a porous substrate layer is obtained; and the transition layer and the substrate layer are bonded through modified interface agent slurry, and the surface is polished after cold pressing compounding. The decorative plate has the advantages of being excellent in breathing and humidifying performance, light in weight, high in strength, fireproof, non-combustible, firm in interface bonding, convenient to install and the like, and is suitable for indoor wall decoration.

This utility model discloses a reaction vessel for improving mixing effect, including a reaction vessel body. A positioning support rod is provided at the bottom of the interior of the reaction vessel body. A heating groove is provided on the outer wall of the reaction vessel body, and a heating rod is provided inside the heating groove. A heat transfer oil outlet is provided on one side of the bottom of the heating groove, and a heat transfer oil inlet is provided above the other side of the heating groove. Support frames are provided on the lower sides of both sides of the reaction vessel body. In this utility model, a screen is provided at the bottom of the material mixing cylinder. This structure is suitable for mixing multiple raw materials. During the addition of raw materials, dry mixing can be performed using the material mixing cylinder. Simultaneously, the screen at the bottom can screen and crush any lumpy raw materials, ensuring even downward distribution and conveying of the raw materials. This effectively avoids material clumping, accelerates the mixing speed, and thus improves the mixing effect.

This invention belongs to the field of building repair materials technology and provides a water-resistant and freeze-resistant magnesium phosphate cement repair mortar and its preparation method. The raw materials of the water-resistant and freeze-resistant magnesium phosphate cement repair mortar include: modified magnesium oxide, potassium dihydrogen phosphate, admixture, retarder, fine aggregate, water-reducing agent and water. The preparation method includes: (1) dry mixing: the modified magnesium oxide, potassium dihydrogen phosphate, admixture, fine aggregate and retarder are dry mixed to obtain a dry material system; (2) wet mixing and molding: half the mass of water is added to the dry material system, and after stirring, the remaining mass of water and water-reducing agent are added, and stirring is continued to obtain the water-resistant and freeze-resistant magnesium phosphate cement repair mortar. The repair mortar has excellent water resistance, freeze resistance and mechanical properties. The preparation method has a simplified preparation process, low production cost, and can realize the high-value utilization of solid waste, meeting the needs of rapid repair of building projects in harsh environments such as dampness and cold.

The invention relates to the technical field of medical medicines, and discloses a composition for relieving eye strong light burn and a preparation method thereof. The composition is prepared from the following components in percentage by weight: 0.5 to 3 percent of sodium aliphatate, 30 to 50 percent of corn starch, 25 to 45 percent of talcum powder, 1 to 4 percent of cresol, 5 to 15 percent of flos chrysanthemi indici, 0.05 to 0.5 percent of radix scutellariae, 0.01 to 0.1 percent of flos carthami, 0.1 to 1 percent of aqueous solvent and the balance of water. The preparation method comprises the following steps: crushing medicinal materials; preparing a water-phase matrix containing a water-based solvent and sodium aliphatate; performing dry mixing on corn starch, talcum powder and the medicinal material fine powder; and mixing the water phase and the solid phase, adding cresol, homogenizing, adjusting the pH value, and sterilizing to obtain a paste or pasty composition. The composition can effectively relieve ocular surface pain, lacrimation and foreign body sensation caused by strong light burn through cooperation of multiple ways of physical protection, anti-inflammatory repair and oxidation resistance.

The invention discloses a preparation method of a medium-low temperature wear-resistant castable for the lithium salt industry. The preparation method comprises the following steps: S1, dry mixing of raw materials; S2, preparation of a wear-resistant composite material; and S3, wet mixing and stirring. According to the method disclosed by the invention, the wear resistance of the castable is enhanced by compounding the light mullite and the phenolic resin, and the thermal shock resistance of the material is improved by floating a low-density light mullite sheet to form a wear-resistant surface layer; the tensile strength and toughness of the material are effectively enhanced and the crack resistance of the castable is improved through the surface activation treatment and hot pressing process of the carbon fibers; through the synergistic effect of SiC and ZrO2, SiC provides high hardness and wear resistance, ZrO2 enhances the toughness and thermal stability of the material, and the comprehensive performance of the castable under the medium and low temperature working conditions is remarkably improved by combining the accurate proportioning of the dry blend and the ultrasonic wet mixing and stirring technology.

The invention belongs to the technical field of graphite material production, and particularly discloses a production method of an isotropic graphitized cathode carbon block, which comprises the following steps: respectively crushing and grinding calcined petroleum coke and coal pitch, and controlling the particle sizes of the calcined petroleum coke and the coal pitch in a preset range; carrying out dry mixing on the calcined petroleum coke powder and part of the coal pitch powder, then heating and carrying out wet mixing, then adding the rest coal pitch powder, and after the coal pitch is molten, pressurizing and carrying out secondary mixing and kneading to prepare a paste material; rolling the paste for at least two times to obtain a flaky intermediate, cooling the flaky intermediate, crushing and grinding, and controlling the granularity of the flaky intermediate to a target range; loading the flaky intermediate powder into a mold for isostatic pressing to obtain a pressed blank, and roasting with the mold; after roasting, demolding and graphitizing to obtain a target carbon block. The coal pitch powder is added twice for mixing and kneading, so that material agglomeration is reduced, and the mixing and kneading effects are ensured; the green body is prevented from expanding and cracking through in-mold roasting, and the coking value of asphalt is increased; and the product meets the requirement of a large prebaking tank, and is high in yield and suitable for industrial popularization.

This application belongs to the field of powder metallurgy technology, specifically a bicrystalline cemented carbide and its preparation method. The preparation method includes the following steps: mixing fine WC powder (2~4μm), Co powder, VC, and Cr3C2, followed by ball milling and spray granulation to obtain fine WC-Co composite powder; mixing coarse WC powder (8~12μm), Co powder, and ultrafine WC powder (0.15~0.25μm), followed by ball milling and spray granulation to obtain coarse WC-Co composite powder; and dry mixing, pressing, and sintering the fine WC-Co composite powder and the coarse WC-Co composite powder to obtain a bicrystalline cemented carbide with a Rockwell hardness of 87~90 HRA and a fracture toughness of 14~17 MPa·m. 1 / 2 The bending strength is 2500~3000MPa. This application prepares coarse and fine WC-Co composite powders separately, so that the inhibitor can effectively suppress the growth of fine WC grains during the sintering stage, while the ultrafine WC can promote the growth of coarse WC grains. This results in the prepared cemented carbide exhibiting a clear dual-scale WC grain distribution, while possessing both high hardness and high toughness. After dry mixing and pressing sintering, the prepared bicrystalline cemented carbide has high density.

The invention provides a furfural wastewater treatment method, which belongs to the technical field of wastewater treatment, and comprises the following steps: carrying out dry mixing on titanium dioxide powder, coking coal, alpha-Al2O3 and an auxiliary agent, adding into a silica sol mixed solution, and stirring to form a mixed suspension; uniformly coating polyurethane foam with the mixed suspension, standing, centrifuging, drying, heating, preserving heat and cooling in an inert gas environment to obtain a three-dimensional ceramic carbon composite material; uniformly mixing bentonite, the NH4NO3 modified Fe-Mn oxide composite material, iron powder and deionized water, kneading, and drying to obtain an iron-based composite material; fixing the three-dimensional ceramic carbon composite material in a reaction device, adding the iron-based composite material into the reaction device, introducing the furfural wastewater into the device for electrolytic reaction, adding calcium oxide powder, adjusting the pH value, flocculating, and filtering to complete the treatment of the furfural wastewater. The method can reduce the toxicity of the wastewater and improve the biodegradability of the wastewater.

A cementitious material containing carbon nanotubes (CNTs) having a CNT hybrid material comprising the cementitious material and cement. The CNT hybrid material is partially or completely deposited onto the cement after dry mixing to form the CNT-containing cementitious material.

This application discloses a sheep milk probiotic formula milk powder that can regulate intestinal flora and its preparation method. By weight, it contains the following raw material components: 600-700 parts sheep milk base, 5-15 parts compound probiotic powder, 30-60 parts prebiotic composition, 10-30 parts functional additives, and 5-20 parts nutritional fortifiers. This compound formula combines multiple probiotics and optimizes the strain ratio to achieve a synergistic colonization effect. The probiotics are prepared using a freeze-drying process, effectively improving problems caused by flora imbalance. Simultaneously, multiple compound prebiotics provide nutritional support for the proliferation of beneficial bacteria, synergistically enhancing the intestinal regulatory effect. Added functional components such as lactoferrin, chitosan, β-glucan, and poria cocos polysaccharide make it suitable for long-term conditioning consumption by sub-healthy individuals and those with weak digestive systems. The raw sheep milk undergoes vacuum distillation to remove the muttony odor. A process of wet powdering followed by aseptic dry mixing of probiotics is used, resulting in a more stable overall quality of the finished product.

The application discloses a carbon dioxide adsorbent and a preparation method and application thereof, and relates to the technical field of carbon dioxide capture and resource utilization. The preparation method comprises the following steps: raw material pretreatment: the carbide slag and fly ash are respectively subjected to screening and drying treatment; preparation of the carbon dioxide adsorbent: the pretreated carbide slag and fly ash are placed in a mixing device in a mass ratio of 8-10:1 for dry mixing treatment to obtain a mixture, and then the mixture is placed in a high-temperature reaction furnace for constant-temperature calcination at 840 DEG C-860 DEG C, and the calcination time is 1h-3h, so that a carbon dioxide adsorbent containing Ca 12 Al 14 O 33 substance is generated in situ. The carbon dioxide adsorbent provided by the application takes two kinds of industrial solid wastes, namely, carbide slag and fly ash, as raw materials, can be applied to carbon dioxide capture, greatly reduces the cost of calcium cycle carbon dioxide capture, and opens up a high-value path for bulk resource utilization of the carbide slag and fly ash.

This invention proposes a lightweight, high-strength inorganic microcrystalline plastic insulation board and its preparation method. The method involves dry mixing ultrafine activated cementitious materials, composite insulating aggregates, and functional additives, placing the mixture between parallel electrode plates, and applying and maintaining a low-intensity alternating electric field. This causes the charged particles and new biological phases generated during the hydration process of the ultrafine activated cementitious materials to migrate directionally under the influence of the electric field. Then, a vacuum is applied to one side of the mold, while a permeating liquid containing nano-silica sol and film-forming polymers is applied to the other side. The mixture is then pressed, cured, and cut to obtain the lightweight, high-strength inorganic microcrystalline plastic insulation board. This invention utilizes an electric field to drive the directional migration of charged particles and new biological phases generated during the hydration process of the cementitious materials in the early stages of hydration. This allows the ultrafine cementitious particles to preferentially and orderly coat the surface of the insulating aggregates, thereby pre-constructing a tightly bonded and densely structured slurry network at the microscale.